Editing getCtlHandle - FilterMeisterWiki

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= getCtlHandle =

== Syntax ==
:{{int* getCtlHandle(int n)}}

== Arguments ==
'''n'''
:The number of the control you want the handle of

== Returns ==
:A handle to the requested control

== Description ==
:Gets the window handle (pointer) of the specific control. The handle can then be used with other Win32 API commands that require a window/control handle.

== Example ==
<code>
// This code loads the user32.dll
// DLL included with Windows and
// uses it to hide and show the
// scrollbar control.

ctl[1]: STANDARD, Text="Example"

int* lib_user32;
int* functionPointer;
int* controlHandle;
int returnval;

// Load the DLL library
lib_user32 = loadLib("user32");
if (lib_user32) {

// Get the function in the DLL
  functionPointer = getLibFn(lib_user32, "ShowWindow");
  if (functionPointer) {

// Get the handle of the dialog
    controlHandle = getCtlHandle(1);

// Call the function to hide the scrollbar
    msgBox(MB_OK, "Hiding...", "About to hide scrollbar");
    returnval = callLib(functionPointer, controlHandle, SW_HIDE);

// Call the function to show the dialog window
    msgBox(MB_OK, "Showing...", "About to show scrollbar again");
    returnval = callLib(functionPointer, controlHandle, SW_SHOW);

}
  else msgBox(MB_OK, "Error", "Function wasn't loaded");

// Free the library DLL
  freeLib(lib_user32);

}
else msgBox(MB_OK, "Error", "DLL was not loaded");
</code>

== See Also ==
:((getDialogHandle))

== Comments ==
:Everyone can add his comments about his experiences with this function here. Tips for using it are welcome, too.

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